CN114179274B - Manufacturing method for improving warpage of composite membrane plate - Google Patents
Manufacturing method for improving warpage of composite membrane plate Download PDFInfo
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- CN114179274B CN114179274B CN202111355120.XA CN202111355120A CN114179274B CN 114179274 B CN114179274 B CN 114179274B CN 202111355120 A CN202111355120 A CN 202111355120A CN 114179274 B CN114179274 B CN 114179274B
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- 239000002131 composite material Substances 0.000 title claims abstract description 81
- 239000012528 membrane Substances 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 239000011248 coating agent Substances 0.000 claims abstract description 89
- 238000000576 coating method Methods 0.000 claims abstract description 89
- 238000004804 winding Methods 0.000 claims abstract description 88
- 229920001721 polyimide Polymers 0.000 claims abstract description 68
- 238000000034 method Methods 0.000 claims abstract description 54
- 239000003822 epoxy resin Substances 0.000 claims abstract description 37
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 37
- 238000005096 rolling process Methods 0.000 claims abstract description 30
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 11
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 238000004806 packaging method and process Methods 0.000 claims abstract description 10
- 230000000379 polymerizing effect Effects 0.000 claims abstract description 10
- 238000003825 pressing Methods 0.000 claims description 54
- 238000007599 discharging Methods 0.000 claims description 40
- 239000000463 material Substances 0.000 claims description 29
- 230000001105 regulatory effect Effects 0.000 claims description 20
- 238000005520 cutting process Methods 0.000 claims description 9
- 238000003860 storage Methods 0.000 claims description 3
- 238000010030 laminating Methods 0.000 abstract description 9
- 230000000052 comparative effect Effects 0.000 description 10
- 239000011265 semifinished product Substances 0.000 description 4
- 239000003292 glue Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/24—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of indefinite length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/34—Component parts, details or accessories; Auxiliary operations
- B29C41/42—Removing articles from moulds, cores or other substrates
- B29C41/44—Articles of indefinite length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/34—Component parts, details or accessories; Auxiliary operations
- B29C41/46—Heating or cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/34—Component parts, details or accessories; Auxiliary operations
- B29C41/52—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2007/00—Flat articles, e.g. films or sheets
- B29L2007/002—Panels; Plates; Sheets
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Moulding By Coating Moulds (AREA)
- Laminated Bodies (AREA)
Abstract
The application relates to a manufacturing method for improving the warping of a composite membrane plate, which is characterized by comprising the following steps of: the method comprises the following steps: uniformly mixing epoxy resin and a curing agent in a polymerization device, and polymerizing for later use; coating: uniformly coating the polymerized epoxy resin on the first polyimide film by using a coating unit under the condition of low tension; and (3) rolling: laminating the second polyimide film and the third polyimide film by using a rolling unit under the condition of low tension, and then rolling to obtain a semi-finished film of the composite film; and (3) reversely rolling: reversely winding the semi-finished film into a reverse semi-finished film by utilizing a reverse winding unit under the condition of low tension; and then standing, baking, slitting and packaging to obtain the composite film. According to the application, the tension of multiple positions of the coating machine is reduced, and the reverse winding procedure is added, so that the warp of the obtained composite film plate is greatly reduced, and the requirement of the subsequent mechanical laminating operation of the client is met.
Description
Technical Field
The application relates to a composite membrane, in particular to a manufacturing method for improving the warping of a composite membrane plate.
Background
The traditional preparation method of the composite film comprises the following steps: uniformly coating epoxy resin glue on a polyimide film by using a coating machine, taking away solvent-containing gas by hot air to dry the polyimide film, bonding the PI film coated with one side glue material with the PI film, rolling the PI film into a rolled semi-finished product composite film, and baking the rolled semi-finished product composite film to obtain a finished product. The composite film plate warps are serious, the heights of the composite film plates with different specifications are different, the plate warps of the composite film with the size of 25 x 30cm are generally larger than 3cm and the plate warps of the composite film with the size of 4 x 1cm are generally larger than 1cm, the warping degree of the composite film plate cannot influence the follow-up client to adopt traditional manual operation, more and more clients adopt mechanical laminating operation along with the popularization of automation, and a mechanical sucker sucks the composite film with the serious plate warps to easily fall off and the sucking position is inaccurate, so that the mechanical laminating operation is seriously influenced.
Disclosure of Invention
In order to overcome the defects, the application provides the manufacturing method for improving the warping of the composite membrane plate, in the operation method, the tension of a plurality of positions of a coating machine is reduced, and the reverse rolling procedure is added, so that the warping of the obtained composite membrane plate is greatly reduced, the requirement of the subsequent mechanical laminating operation of a client is met, the operation range of the composite membrane is enlarged, and the market competitiveness of the composite membrane is improved.
The technical scheme adopted by the application for solving the technical problems is as follows:
a manufacturing method for improving the warping of a composite film plate comprises the following steps:
step 1: uniformly mixing epoxy resin and a curing agent in a polymerization device, polymerizing for later use, and simultaneously debugging a coating machine, wherein the coating machine comprises a coating unit, a winding unit, a reverse winding unit, a baking unit and a slitting unit;
step 2: coating: regulating the tension of each part of the coating unit, and uniformly coating the polymerized epoxy resin on the first polyimide film by using the coating unit under the condition of low tension to obtain a second polyimide film;
step 3: and (3) rolling: the tension of each part of the winding unit is regulated, and the winding unit is utilized to press the second polyimide film and the third polyimide film under the condition of low tension and then wind the second polyimide film and the third polyimide film, so as to obtain a semi-finished film of the composite film;
step 4: and (3) reversely rolling: after the tension of each part of the reverse winding unit is regulated, the reverse winding unit is utilized to reversely wind the semi-finished film into a reverse semi-finished film under the condition of low tension;
step 5: standing: standing the reverse semi-finished film for a period of time to primarily cure the epoxy resin;
step 6: baking: placing the left-standing reverse semi-finished film in a baking unit for baking and curing;
step 7: splitting: sending the baked reverse semi-finished film into a slitting unit, and cutting to form a finished film;
step 8: and (3) packaging: and packaging the finished film by using a packaging unit and conveying the packaged finished film to a storage area.
Preferably, in step 2 above, the coating unit includes a first discharging component, a coating component, an oven component, a first tensioning arm, a second tensioning arm and a third tensioning arm, the first tensioning arm is close to the first discharging component, the second tensioning arm and the third tensioning arm are respectively located at an inlet and an outlet of the oven component, the first polyimide film is discharged through the first discharging component, the epoxy resin is coated on the first polyimide film through the coating component, and the first polyimide film coated with the epoxy resin is wound by the winding unit after being baked by the oven component.
Preferably, during coating, the unwinding speed of the first unreeling component is 6-17m/min, the pressure is 1-2kg, the tension at the first tensioning arm is 30-50N, the tension at the second tensioning arm is 40-50N, and the tension at the third tensioning arm is 35-45N; the oven assembly is divided into a first-stage oven, a middle-stage oven and a tail-end oven, wherein the temperature of the first-stage oven is 95-105 ℃, the temperature of the middle-stage oven is 170-180 ℃, and the temperature of the tail-stage oven is 75-85 ℃.
Preferably, in step 3, the winding unit includes a second discharging component, a first receiving component, a fourth tensioning arm, a fifth tensioning arm and a first compacting component, the first compacting component includes a pressing roller and a feeding roller, the second discharging component is used for discharging a third polyimide film, the second polyimide film and the third polyimide film are wound by the first receiving component after being pressed by the first compacting component, the fourth tensioning arm is close to the second discharging component, and the fifth tensioning arm is close to the first receiving component.
Preferably, the speed of the first material receiving component is 6-17m/min, the tension at the fourth tensioning arm is 35-45N, the tension at the fifth tensioning arm is 30-50N, the tension at the pressing roller of the first pressing component is 25-35N, and the tension at the feeding roller of the first pressing component is 25-45N.
Preferably, in step 4, the reverse winding unit includes a third discharging component, a second receiving component and a second compacting component, the second compacting component includes a pressing roller and a feeding roller, and the semi-finished film is compacted by the second compacting component after being discharged by the third discharging component, so as to form a reverse semi-finished film.
Preferably, the speed of the second material receiving component is 6-17m/min, the tension of the third material discharging component is 35-45N, the tension of the second material receiving component is 30-50N, the tension at the pressing roller of the second pressing component is 25-35N, and the tension at the feeding roller of the second pressing component is 25-45N.
Preferably, in step 5, the temperature at rest is 20-25 ℃, the humidity is 35-45% RH, the rest time is 8-30h, in step 6, the highest temperature of baking is 175-185 ℃, the baking time is 8-20h, and in step 7, the slitting speed is 10-15m/min.
Preferably, in step 6, the whole baking process is divided into three stages: from room temperature to maximum temperature, maintaining the maximum temperature phase and for a period of time from maximum temperature to room temperature, the maximum temperature being 180 ℃.
The beneficial effects of the application are as follows: according to the application, a reverse winding process is added in the traditional composite film manufacturing method, and the tension in a coating unit, a winding unit and a reverse winding unit is further reduced, so that the warp of the prepared composite film plate is greatly reduced, the warp of the composite film with the thickness of 25 x 30cm is reduced from more than 3cm to 0.2-0.6cm, and the warp of the composite film with the thickness of 4 x 1cm is reduced from more than 1cm to 0.2-0.3cm, thereby being convenient for a mechanical sucker to accurately absorb, avoiding falling off, meeting the requirement of the mechanical laminating operation of a subsequent client, expanding the operation range of the composite film and improving the market competitiveness of the composite film.
Drawings
FIG. 1 is a schematic diagram of the structure of the present application;
FIG. 2 is a simplified illustration of a composite membrane plate of the prior art;
FIG. 3 is a simplified illustration of a composite membrane plate according to the present application;
in the figure: 10-polymerization device, 11-epoxy resin, 20-coating unit, 21-first discharging component, 22-coating component, 23-oven component, 24-first tensioning arm, 25-second tensioning arm, 26-third tensioning arm, 27-first polyimide film, 28-second polyimide film, 30-rolling unit, 31-second discharging component, 32-first receiving component, 33-fourth tensioning arm, 34-fifth tensioning arm, 35-pressing roller, 36-feeding roller, 37-third polyimide film, 38-semi-finished film, 40-reverse rolling unit, 41-third discharging component, 42-second receiving component, 43-reverse semi-finished film, 50-baking unit, 60-slitting unit, 61-finished film, 70-packaging unit.
Detailed Description
The technical solutions of the embodiments of the present application will be clearly and completely described below in conjunction with the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be capable of being practiced otherwise than as specifically shown or described. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
A manufacturing method for improving the warping of a composite film plate comprises the following steps:
step 1: uniformly mixing epoxy resin and curing agent in a polymerization device 10, polymerizing for later use, and simultaneously debugging a coating machine, wherein the coating machine comprises a coating unit 20, a winding unit 30, a reverse winding unit 40, a baking unit 50 and a slitting unit 60 as shown in fig. 1;
step 2: coating: the tension of the coating unit 20 is regulated, and the polymerized epoxy resin 11 is uniformly coated on the first polyimide film 27 by the coating unit 20 under the condition of low tension to obtain a second polyimide film 28;
step 3: and (3) rolling: the tension of each part of the winding unit 30 is regulated, the winding unit 30 is utilized to press the second polyimide film 28 and the third polyimide film 37 under the condition of low tension, and then the semi-finished film 38 of the composite film is obtained; the first polyimide film is a single-layer film, and the third polyimide film can be a single-layer film, a double-layer film or a multi-layer film;
step 4: and (3) reversely rolling: after the tension of the reverse winding unit 40 is adjusted, the semi-finished film 38 is reversely wound into a reverse semi-finished film 43 by the reverse winding unit 40 under the condition of low tension;
step 5: standing: standing the reverse semi-finished film 43 for a period of time to allow the epoxy resin to be primarily cured;
step 6: baking: placing the left-standing reverse semi-finished film 43 in a baking unit 50 for baking and curing;
step 7: splitting: feeding the baked reverse semi-finished film 43 into a slitting unit, and cutting to form a finished film 61;
step 8: and (3) packaging: the finished film 61 is packaged by the packaging unit 70 and transported to a storage area.
According to the application, a reverse winding process is added in the traditional composite film manufacturing method, and the tension in a coating unit, a winding unit and a reverse winding unit is further reduced, so that the warp of the prepared composite film plate is greatly reduced, the warp of the composite film with the thickness of 25 x 30cm is reduced from more than 3cm to 0.2-0.6cm, and the warp of the composite film with the thickness of 4 x 1cm is reduced from more than 1cm (shown in figure 2) to 0.2-0.3cm (shown in figure 3), thereby being convenient for the accurate suction of a mechanical sucker, avoiding the falling phenomenon, meeting the requirement of the subsequent mechanical laminating operation of a client, expanding the operation range of the composite film and improving the market competitiveness of the composite film.
In the step 2, the coating unit 20 includes a first discharging component 21, a coating component 22, an oven component 23, a first tensioning arm 24, a second tensioning arm 25 and a third tensioning arm 26, where the first tensioning arm 24 is close to the first discharging component 21, the second tensioning arm 25 and the third tensioning arm 26 are respectively located at an inlet and an outlet of the oven component 23, the first polyimide film 27 is discharged by the first discharging component 21, the epoxy resin 11 is coated on the first polyimide film 27 by the coating component 22, and the first polyimide film 27 coated with the epoxy resin is rolled by the rolling unit 30 after being baked by the oven component 23 to form a second polyimide film 28. The tension at the first tensioning arm 24 is the tension of the first discharging component 21.
During coating, the unreeling speed of the first unreeling component 21 is 6-17m/min, the pressure is 1-2kg, the tension at the first tensioning arm 24 is 30-50N, the tension at the second tensioning arm 25 is 40-50N, and the tension at the third tensioning arm 26 is 35-45N; the oven assembly 23 is divided into a first-stage oven, a middle-stage oven and a tail-end oven, wherein the temperature of the first-stage oven is 95-105 ℃, the temperature of the middle-stage oven is 170-180 ℃, and the temperature of the tail-stage oven is 75-85 ℃. The first section of oven is close to the inlet of the oven assembly, the last section of oven is close to the outlet of the oven assembly, the middle section of oven is positioned between the first section of oven and the last section of oven, and more preferably, the temperature of the first section of oven is 100 ℃, the temperature of the middle section of oven is 175 ℃, and the temperature of the last section of oven is 80 ℃; the tension of each part of the coating unit in the process is as follows: the tension at the first tensioning arm 24, i.e. the tension of the first blanking assembly 21, is 30-50N, the tension at the second tensioning arm 25 is 40-50N, and the tension at the third tensioning arm 26 is 35-45N.
In step 3, the winding unit 30 includes a second discharging component 31, a first receiving component 32, a fourth tensioning arm 33, a fifth tensioning arm 34, and a first compacting component, where the first compacting component includes a pressing roller 35 and a feeding roller 36, the second discharging component 31 is used for discharging a third polyimide film 37, after the second polyimide film 28 and the third polyimide film 37 are pressed by the first compacting component, the semi-finished film 38 is wound by the first receiving component 32, the fourth tensioning arm 33 is close to the second discharging component 31, and the fifth tensioning arm 34 is close to the first receiving component 32. I.e. the tension at the fourth tensioning arm 33 is the tension of the unreeling of the second unreeling assembly 31, and the tension at the fifth tensioning arm 34 is the reeling tension of the first reeling assembly 32.
The speed of the first material receiving component 32 is 6-17m/min, the tension at the fourth tensioning arm 33 is 35-45N, the tension at the fifth tensioning arm is 30-50N, the tension at the pressing roller 35 of the first pressing component is 25-35N, and the tension at the feeding roller 36 of the first pressing component is 25-45N.
The tension of each part of the coating unit and the winding unit in the process is as follows: the tension at the first tensioning arm 24, namely the tension of the first discharging assembly 21, is 30-50N, the tension at the second tensioning arm 25 is 40-50N, and the tension at the third tensioning arm 26 is 35-45N; the tension of unreeling the second unreeling component 31 at the fourth tensioning arm 33 is 35-45N, the tension of unreeling the first receiving component 32 at the fifth tensioning arm is 30-50N, the tension of the first compacting component at the pressing roller 35 is 25-35N, and the tension of the first compacting component at the feeding roller 36 is 25-45N; the tension of each part of the coating unit and the winding unit in the traditional process is as follows: the tension at the first tensioning arm 24, namely the tension of the first discharging assembly 21, is 60-80N, the tension at the second tensioning arm 25 is 45-55N, and the tension at the third tensioning arm 26 is 35-45N; the tension of unreeling the second unreeling component 31 at the fourth tensioning arm 33 is 65-75N, the tension of unreeling the first receiving component 32 at the fifth tensioning arm is 30-50N, the tension of the first compacting component at the pressing roller 35 is 35-45N, and the tension of the first compacting component at the feeding roller 36 is 90-110N; therefore, the tension of a plurality of positions of the coating machine is reduced in the process, the plate warpage of the semi-finished film 38 obtained under the original tension condition is about 6.4cm, and the plate warpage of the semi-finished film obtained under the process tension condition is about 1.5cm, so that the plate warpage degree of the semi-finished film is greatly reduced.
In step 4, the reverse winding unit 40 includes a third discharging component 41, a second receiving component 42, and a second compacting component, where the second compacting component includes a pressing roller 35 and a feeding roller 36, and the semi-finished film 38 is discharged by the third discharging component 41 and then compacted by the second compacting component, and then received by the second receiving component 42, so as to form a reverse semi-finished film 43. The reverse winding unit 40 winds the semi-finished product roll wound by the winding unit 30 once again from the tail end of the semi-finished product roll.
The speed of the second material receiving component 42 is 6-17m/min, the tension of the third material discharging component 41 is 35-45N, the tension of the second material receiving component is 30-50N, the tension at the pressing roller 35 of the second pressing component is 25-35N, and the tension at the feeding roller 36 of the second pressing component is 25-45N.
In step 5, the temperature is 20-25 ℃, the humidity is 35-45% RH, the standing time is 8-30h, in step 6, the highest baking temperature is 175-185 ℃, the baking time is 8-20h, and in step 7, the slitting speed is 10-15m/min. In the process, a reverse rolling process is added, after the reverse rolling and baking process, the plate warpage of the reverse semi-finished film 43 is reduced to less than 0.6cm, the finished film plate tends to be flat after the slitting rolling, the plate warpage of the 25 x 30cm composite film is reduced to 0.2-0.6cm, and the plate warpage of the 4 x 1cm composite film is reduced to 0.2-0.3cm. In step 6, the whole baking process is divided into three stages: from room temperature to maximum temperature, maintaining the maximum temperature phase and for a period of time from maximum temperature to room temperature, the maximum temperature being 180 ℃.
Example 1: the composite film is prepared by the following method:
step 1: uniformly mixing epoxy resin and a curing agent in a polymerization device 10, polymerizing for later use, and simultaneously debugging a coating machine, wherein the coating machine comprises a coating unit 20, a winding unit 30, a reverse winding unit 40, a baking unit 50 and a slitting unit 60;
step 2: coating: the tension of the coating unit 20 is regulated, and the polymerized epoxy resin 11 is uniformly coated on the first polyimide film 27 by the coating unit 20 under the condition of low tension to obtain a second polyimide film 28;
the process parameters during coating are as follows: the unreeling speed of the first unreeling component 21 is 15m/min, the pressure is 2kg, the tension at the first tensioning arm 24 is 40N, the tension at the second tensioning arm 25 is 45N, and the tension at the third tensioning arm 26 is 40N; the oven assembly 23 is divided into a first-stage oven, a middle-stage oven and a tail-end oven, wherein the temperature of the first-stage oven is 100 ℃, the temperature of the middle-stage oven is 175 ℃, and the temperature of the tail-stage oven is 80 ℃;
step 3: and (3) rolling: the tension of each part of the winding unit 30 is regulated, the winding unit 30 is utilized to press the second polyimide film 28 and the third polyimide film 37 under the condition of low tension, and then the semi-finished film 38 of the composite film is obtained;
the technological parameters during winding are as follows: the speed of the first material receiving component 32 is 15m/min, the tension at the fourth tensioning arm 33 is 40N, the tension at the fifth tensioning arm is 40N, the tension at the pressing roller 35 of the first pressing component is 30N, and the tension at the feeding roller 36 of the first pressing component is 35N;
step 4: and (3) reversely rolling: after the tension of the reverse winding unit 40 is adjusted, the semi-finished film 38 is reversely wound into a reverse semi-finished film 43 by the reverse winding unit 40 under the condition of low tension;
the technological parameters during reverse winding are as follows: the speed of the second material receiving component 42 is 15m/min, the tension of the third material discharging component is 40N, the tension of the second material receiving component is 40N, the tension at the pressing roller 35 of the second pressing component is 30N, and the tension at the feeding roller 36 of the second pressing component is 35N;
step 5: standing: standing the reverse semi-finished film 43 for a period of time to allow the epoxy resin to be primarily cured; the temperature is 20-25 ℃, the humidity is 35-45% RH, and the standing time is 20h;
step 6: baking: placing the left-standing reverse semi-finished film 43 in a baking unit 50 for baking and curing; the highest temperature of baking is 180 ℃ and the baking time is 15h;
step 7: splitting: feeding the baked reverse semi-finished film 43 into a slitting unit, and cutting to form a finished film 61; the speed of the slitting was 15m/min.
Example 2: the composite film is prepared by the following method:
step 1: uniformly mixing epoxy resin and a curing agent in a polymerization device 10, polymerizing for later use, and simultaneously debugging a coating machine, wherein the coating machine comprises a coating unit 20, a winding unit 30, a reverse winding unit 40, a baking unit 50 and a slitting unit 60;
step 2: coating: the tension of the coating unit 20 is regulated, and the polymerized epoxy resin 11 is uniformly coated on the first polyimide film 27 by the coating unit 20 under the condition of low tension to obtain a second polyimide film 28;
the process parameters during coating are as follows: the unreeling speed of the first unreeling component 21 is 15m/min, the pressure is 2kg, the tension at the first tensioning arm 24 is 30N, the tension at the second tensioning arm 25 is 40N, and the tension at the third tensioning arm 26 is 35N; the oven assembly 23 is divided into a first-stage oven, a middle-stage oven and a tail-end oven, wherein the temperature of the first-stage oven is 100 ℃, the temperature of the middle-stage oven is 175 ℃, and the temperature of the tail-stage oven is 80 ℃;
step 3: and (3) rolling: the tension of each part of the winding unit 30 is regulated, the winding unit 30 is utilized to press the second polyimide film 28 and the third polyimide film 37 under the condition of low tension, and then the semi-finished film 38 of the composite film is obtained;
the technological parameters during winding are as follows: the speed of the first material receiving component 32 is 15m/min, the tension at the fourth tensioning arm 33 is 35N, the tension at the fifth tensioning arm is 30N, the tension at the pressing roller 35 of the first pressing component is 25N, and the tension at the feeding roller 36 of the first pressing component is 25N;
step 4: and (3) reversely rolling: after the tension of the reverse winding unit 40 is adjusted, the semi-finished film 38 is reversely wound into a reverse semi-finished film 43 by the reverse winding unit 40 under the condition of low tension;
the technological parameters during reverse winding are as follows: the speed of the second material receiving component 42 is 15m/min, the tension of the third material discharging component is 35N, the tension of the second material receiving component is 30N, the tension at the pressing roller 35 of the second pressing component is 25N, and the tension at the feeding roller 36 of the second pressing component is 25N;
step 5: standing: standing the reverse semi-finished film 43 for a period of time to allow the epoxy resin to be primarily cured; the temperature is 20-25 ℃, the humidity is 35-45% RH, and the standing time is 20h;
step 6: baking: placing the left-standing reverse semi-finished film 43 in a baking unit 50 for baking and curing; the highest temperature of baking is 180 ℃ and the baking time is 15h;
step 7: splitting: feeding the baked reverse semi-finished film 43 into a slitting unit, and cutting to form a finished film 61; the speed of the slitting was 15m/min.
Example 3: the composite film is prepared by the following method:
step 1: uniformly mixing epoxy resin and a curing agent in a polymerization device 10, polymerizing for later use, and simultaneously debugging a coating machine, wherein the coating machine comprises a coating unit 20, a winding unit 30, a reverse winding unit 40, a baking unit 50 and a slitting unit 60;
step 2: coating: the tension of the coating unit 20 is regulated, and the polymerized epoxy resin 11 is uniformly coated on the first polyimide film 27 by the coating unit 20 under the condition of low tension to obtain a second polyimide film 28;
the process parameters during coating are as follows: the unreeling speed of the first unreeling component 21 is 15m/min, the pressure is 2kg, the tension at the first tensioning arm 24 is 50N, the tension at the second tensioning arm 25 is 50N, and the tension at the third tensioning arm 26 is 45N; the oven assembly 23 is divided into a first-stage oven, a middle-stage oven and a tail-end oven, wherein the temperature of the first-stage oven is 100 ℃, the temperature of the middle-stage oven is 175 ℃, and the temperature of the tail-stage oven is 80 ℃;
step 3: and (3) rolling: the tension of each part of the winding unit 30 is regulated, the winding unit 30 is utilized to press the second polyimide film 28 and the third polyimide film 37 under the condition of low tension, and then the semi-finished film 38 of the composite film is obtained;
the technological parameters during winding are as follows: the speed of the first material receiving component 32 is 15m/min, the tension at the fourth tensioning arm 33 is 45N, the tension at the fifth tensioning arm is 50N, the tension at the pressing roller 35 of the first pressing component is 35N, and the tension at the feeding roller 36 of the first pressing component is 45N;
step 4: and (3) reversely rolling: after the tension of the reverse winding unit 40 is adjusted, the semi-finished film 38 is reversely wound into a reverse semi-finished film 43 by the reverse winding unit 40 under the condition of low tension;
the technological parameters during reverse winding are as follows: the speed of the second material receiving component 42 is 15m/min, the tension of the third material discharging component is 45N, the tension of the second material receiving component is 50N, the tension at the pressing roller 35 of the second pressing component is 35N, and the tension at the feeding roller 36 of the second pressing component is 45N;
step 5: standing: standing the reverse semi-finished film 43 for a period of time to allow the epoxy resin to be primarily cured; the temperature is 20-25 ℃, the humidity is 35-45% RH, and the standing time is 20h;
step 6: baking: placing the left-standing reverse semi-finished film 43 in a baking unit 50 for baking and curing; the highest temperature of baking is 180 ℃ and the baking time is 15h;
step 7: splitting: feeding the baked reverse semi-finished film 43 into a slitting unit, and cutting to form a finished film 61; the speed of the slitting was 15m/min.
Comparative example 1: compared with example 1, the tension at a plurality of places of the coating machine is different and the reverse winding process is omitted;
step 1: uniformly mixing epoxy resin and a curing agent in a polymerization device 10, polymerizing for later use, and simultaneously debugging a coating machine, wherein the coating machine comprises a coating unit 20, a winding unit 30, a reverse winding unit 40, a baking unit 50 and a slitting unit 60;
step 2: coating: the tension of the coating unit 20 is regulated, and the polymerized epoxy resin 11 is uniformly coated on the first polyimide film 27 by the coating unit 20 under the condition of low tension to obtain a second polyimide film 28;
the process parameters during coating are as follows: the unreeling speed of the first unreeling component 21 is 15m/min, the pressure is 2kg, the tension at the first tensioning arm 24 is 60N, the tension at the second tensioning arm 25 is 55N, and the tension at the third tensioning arm 26 is 40N; the oven assembly 23 is divided into a first-stage oven, a middle-stage oven and a tail-end oven, wherein the temperature of the first-stage oven is 100 ℃, the temperature of the middle-stage oven is 175 ℃, and the temperature of the tail-stage oven is 80 ℃;
step 3: and (3) rolling: the tension of each part of the winding unit 30 is regulated, the winding unit 30 is utilized to press the second polyimide film 28 and the third polyimide film 37 under the condition of low tension, and then the semi-finished film 38 of the composite film is obtained;
the technological parameters during winding are as follows: the speed of the first material receiving component 32 is 15m/min, the tension at the fourth tensioning arm 33 is 65N, the tension at the fifth tensioning arm is 40N, the tension at the pressing roller 35 of the first pressing component is 45N, and the tension at the feeding roller 36 of the first pressing component is 90N;
step 4: standing: standing the semi-finished film 38 for a period of time to allow the epoxy resin to initially cure; the temperature is 20-25 ℃, the humidity is 35-45% RH, and the standing time is 20h;
step 5: baking: placing the left semi-finished film 38 in a baking unit 50 for baking and curing; the highest temperature of baking is 180 ℃ and the baking time is 15h;
step 6: splitting: feeding the baked semi-finished film 38 into a slitting unit, and cutting to form a finished film 61; the speed of the slitting was 15m/min.
Comparative example 2: the tension at the coater was different compared to example 1;
step 1: uniformly mixing epoxy resin and a curing agent in a polymerization device 10, polymerizing for later use, and simultaneously debugging a coating machine, wherein the coating machine comprises a coating unit 20, a winding unit 30, a reverse winding unit 40, a baking unit 50 and a slitting unit 60;
step 2: coating: the tension of the coating unit 20 is regulated, and the polymerized epoxy resin 11 is uniformly coated on the first polyimide film 27 by the coating unit 20 under the condition of low tension to obtain a second polyimide film 28;
the process parameters during coating are as follows: the unreeling speed of the first unreeling component 21 is 15m/min, the pressure is 2kg, the tension at the first tensioning arm 24 is 60N, the tension at the second tensioning arm 25 is 55N, and the tension at the third tensioning arm 26 is 40N; the oven assembly 23 is divided into a first-stage oven, a middle-stage oven and a tail-end oven, wherein the temperature of the first-stage oven is 100 ℃, the temperature of the middle-stage oven is 175 ℃, and the temperature of the tail-stage oven is 80 ℃;
step 3: and (3) rolling: the tension of each part of the winding unit 30 is regulated, the winding unit 30 is utilized to press the second polyimide film 28 and the third polyimide film 37 under the condition of low tension, and then the semi-finished film 38 of the composite film is obtained;
the technological parameters during winding are as follows: the speed of the first material receiving component 32 is 15m/min, the tension at the fourth tensioning arm 33 is 65N, the tension at the fifth tensioning arm is 40N, the tension at the pressing roller 35 of the first pressing component is 45N, and the tension at the feeding roller 36 of the first pressing component is 90N;
step 4: and (3) reversely rolling: after the tension of the reverse winding unit 40 is adjusted, the semi-finished film 38 is reversely wound into a reverse semi-finished film 43 by the reverse winding unit 40 under the condition of low tension;
the technological parameters during reverse winding are as follows: the speed of the second material receiving component 42 is 15m/min, the tension of the third material discharging component is 65N, the tension of the second material receiving component is 40N, the tension at the pressing roller 35 of the second pressing component is 45N, and the tension at the feeding roller 36 of the second pressing component is 90N;
step 5: standing: standing the reverse semi-finished film 43 for a period of time to allow the epoxy resin to be primarily cured; the temperature is 20-25 ℃, the humidity is 35-45% RH, and the standing time is 20h;
step 6: baking: placing the left-standing reverse semi-finished film 43 in a baking unit 50 for baking and curing; the highest temperature of baking is 180 ℃ and the baking time is 15h;
step 7: splitting: feeding the baked reverse semi-finished film 43 into a slitting unit, and cutting to form a finished film 61; the speed of the slitting was 15m/min.
Comparative example 3: only the reverse winding process was omitted as compared with example 1;
step 1: uniformly mixing epoxy resin and a curing agent in a polymerization device 10, polymerizing for later use, and simultaneously debugging a coating machine, wherein the coating machine comprises a coating unit 20, a winding unit 30, a reverse winding unit 40, a baking unit 50 and a slitting unit 60;
step 2: coating: the tension of the coating unit 20 is regulated, and the polymerized epoxy resin 11 is uniformly coated on the first polyimide film 27 by the coating unit 20 under the condition of low tension to obtain a second polyimide film 28;
the process parameters during coating are as follows: the unreeling speed of the first unreeling component 21 is 15m/min, the pressure is 2kg, the tension at the first tensioning arm 24 is 40N, the tension at the second tensioning arm 25 is 45N, and the tension at the third tensioning arm 26 is 40N; the oven assembly 23 is divided into a first-stage oven, a middle-stage oven and a tail-end oven, wherein the temperature of the first-stage oven is 100 ℃, the temperature of the middle-stage oven is 175 ℃, and the temperature of the tail-stage oven is 80 ℃;
step 3: and (3) rolling: the tension of each part of the winding unit 30 is regulated, the winding unit 30 is utilized to press the second polyimide film 28 and the third polyimide film 37 under the condition of low tension, and then the semi-finished film 38 of the composite film is obtained;
the technological parameters during winding are as follows: the speed of the first material receiving component 32 is 15m/min, the tension at the fourth tensioning arm 33 is 40N, the tension at the fifth tensioning arm is 40N, the tension at the pressing roller 35 of the first pressing component is 30N, and the tension at the feeding roller 36 of the first pressing component is 35N;
step 4: standing: standing the semi-finished film 38 for a period of time to allow the epoxy resin to initially cure; the temperature is 20-25 ℃, the humidity is 35-45% RH, and the standing time is 20h;
step 5: baking: placing the left semi-finished film 38 in a baking unit 50 for baking and curing; the highest temperature of baking is 180 ℃ and the baking time is 15h;
step 6: splitting: feeding the baked semi-finished film 38 into a slitting unit, and cutting to form a finished film 61; the speed of the slitting was 15m/min.
The warping test result of the composite film plate:
example 1: the semi-finished film 38 plate warp obtained in the step 3 is 1.5cm; the reverse semi-finished film 43 obtained after baking in the step 6 has a warp of 0.5cm; after slitting, the warp of the composite film plate with the thickness of 25 cm to 30cm is 0.5cm, and the warp of the composite film plate with the thickness of 4cm to 1cm is 0.3cm;
example 2: the semi-finished film 38 plate warp obtained in the step 3 is 1.8cm; the reverse semi-finished film 43 obtained after baking in the step 6 has a warp of 0.6cm; after slitting, the warp of the composite film plate with the thickness of 25 cm to 30cm is 0.3cm, and the warp of the composite film plate with the thickness of 4cm to 1cm is 0.2cm;
example 3: the semi-finished film 38 plate warp obtained in the step 3 is 2.0cm; the reverse semi-finished film 43 obtained after baking in the step 6 has a warp of 0.5cm; after slitting, the warp of the composite film plate with the thickness of 25 cm to 30cm is 0.3cm, and the warp of the composite film plate with the thickness of 4cm to 1cm is 0.2cm;
comparative example 1: the semi-finished film 38 plate warp obtained in the step 3 is 6.4cm; after slitting, the composite membrane plate with the thickness of 25 cm and 30cm is tilted to 4.5cm, and the composite membrane plate with the thickness of 4cm and 1cm is tilted to 1.8cm;
comparative example 2: the semi-finished film 38 plate warp obtained in the step 3 is 6.9cm; the reverse semi-finished film 43 obtained after baking in the step 6 is tilted to be 5cm; after slitting, the composite membrane plate with the thickness of 25 cm and 30cm is tilted to be 3.5cm and the composite membrane plate with the thickness of 4cm and 1cm is tilted to be 1.5cm;
comparative example 3: the semi-finished film 38 plate warp obtained in the step 3 is as follows: 2.0cm; after slitting, the composite membrane plate with the thickness of 25 x 30cm is 1.6cm and the composite membrane plate with the thickness of 4 x 1cm is 1.0cm;
according to the test results of examples 1-3, the winding operation is completed under the condition of extremely low tension, and a reverse winding process is added after the winding is completed, so that the final composite film plate with the thickness of 25 x 30cm is reduced to 0.2-0.6cm, and the composite film plate with the thickness of 4 x 1cm is reduced to 0.2-0.3cm; the comparative example 1 adopts the traditional winding process, namely the winding is completed under the condition of higher tension, and the final composite film plate with the warp of 25 x 30cm is more than 3cm and the warp of 4 x 1cm is more than 1cm; in the comparative example 2, a higher tension condition is adopted and a reverse winding process is added, although the final composite film plate warp is reduced compared with the comparative example 1, the composite film plate warp of 25 x 30cm is still more than 3cm and the composite film plate warp of 4 x 1cm is still more than 1cm, the requirement of a mechanical automatic laminating process still cannot be met, and in the comparative example 3, the tension condition of the application is adopted, but the reverse winding process is not adopted, and the final composite film plate warp of 25 x 30cm is still more than 1.5cm and the composite film plate warp of 4 x 1cm is still more than 1cm, and the requirement of a mechanical laminating process still cannot be met.
It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
Claims (9)
1. A manufacturing method for improving the warping of a composite film plate is characterized by comprising the following steps: the method comprises the following steps:
step 1: uniformly mixing epoxy resin and a curing agent in a polymerization device (10) and polymerizing for later use, and simultaneously debugging a coating machine, wherein the coating machine comprises a coating unit (20), a winding unit (30), a reverse winding unit (40), a baking unit (50) and a slitting unit (60);
step 2: coating: the tension of the coating unit (20) is regulated, and the polymerized epoxy resin (11) is uniformly coated on the first polyimide film (27) by the coating unit (20) under the condition of low tension to obtain a second polyimide film (28);
step 3: and (3) rolling: the tension of each part of the winding unit (30) is regulated, the winding unit (30) is utilized to press the second polyimide film (28) and the third polyimide film (37) under the condition of low tension, and then the semi-finished film (38) of the composite film is obtained;
step 4: and (3) reversely rolling: after the tension of the reverse winding unit (40) is regulated, the semi-finished film (38) is reversely wound into a reverse semi-finished film (43) by the reverse winding unit (40) under the condition of low tension;
step 5: standing: standing the reverse semi-finished film (43) for a period of time to allow the epoxy resin to be primarily cured;
step 6: baking: placing the left-standing reverse semi-finished film (43) in a baking unit (50) for baking and curing;
step 7: splitting: feeding the baked reverse semi-finished film (43) into a slitting unit, and cutting to form a finished film (61);
step 8: and (3) packaging: packaging the finished film (61) by a packaging unit (70) and conveying the finished film to a storage area;
the coating unit (20) comprises a first discharging component (21), a coating component (22), an oven component (23), a first tensioning arm (24), a second tensioning arm (25) and a third tensioning arm (26), wherein the first tensioning arm (24) is close to the first discharging component (21), the second tensioning arm (25) and the third tensioning arm (26) are respectively positioned at the inlet and the outlet of the oven component (23), the tension at the first tensioning arm (24) is 30-50N, the tension at the second tensioning arm (25) is 40-50N, and the tension at the third tensioning arm (26) is 35-45N;
the rolling unit (30) comprises a second discharging component (31), a first collecting component (32), a fourth tensioning arm (33), a fifth tensioning arm (34) and a first compacting component, wherein the first compacting component comprises a pressing roller (35) and a feeding roller (36), the fourth tensioning arm (33) is close to the second discharging component (31), the fifth tensioning arm (34) is close to the first collecting component (32), the tension at the fourth tensioning arm (33) is 35-45N, the tension at the fifth tensioning arm is 30-50N, the tension at the pressing roller (35) of the first compacting component is 25-35N, and the tension at the feeding roller (36) of the first compacting component is 25-45N;
the reverse winding unit (40) comprises a third discharging component (41), a second receiving component (42) and a second compacting component, the second compacting component comprises a pressing roller (35) and a feeding roller (36), the tension of the third discharging component (41) is 35-45N, the tension of the second receiving component is 30-50N, the tension of the pressing roller (35) of the second compacting component is 25-35N, and the tension of the feeding roller (36) of the second compacting component is 25-45N.
2. The method for manufacturing the improved composite membrane plate according to claim 1, wherein the method comprises the following steps: in the step 2, the first polyimide film (27) is discharged through the first discharging component (21), the epoxy resin (11) is coated on the first polyimide film (27) through the coating component (22), and the first polyimide film (27) coated with the epoxy resin is rolled up by the rolling unit (30) after being baked through the oven component (23) to form the second polyimide film (28).
3. The method for manufacturing the improved composite membrane plate according to claim 2, wherein the method comprises the following steps: during coating, the unreeling speed of the first unreeling component (21) is 6-17m/min, the pressure is 1-2kg, the oven component (23) is divided into a first-section oven, a middle-section oven and a tail-end oven, the temperature of the first-section oven is 95-105 ℃, the temperature of the middle-section oven is 170-180 ℃, and the temperature of the tail-section oven is 75-85 ℃.
4. The method for manufacturing the improved composite membrane plate according to claim 1, wherein the method comprises the following steps: in step 3, the second discharging component (31) is used for discharging the third polyimide film (37), and the second polyimide film (28) and the third polyimide film (37) are rolled up through the first receiving component (32) after being pressed by the first pressing component to form a semi-finished film (38).
5. The method for manufacturing the improved composite membrane plate according to claim 4, wherein the method comprises the following steps: the speed of the first material receiving component (32) is 6-17m/min.
6. The method for manufacturing the improved composite membrane plate according to claim 1, wherein the method comprises the following steps: in step 4, the semi-finished film (38) is discharged through the third discharging component (41), compressed through the second compressing component and then received by the second receiving component (42), and a reverse semi-finished film (43) is formed.
7. The method for manufacturing the improved composite membrane plate according to claim 6, wherein the method comprises the following steps: the speed of the second material receiving component (42) is 6-17m/min.
8. The method for manufacturing the improved composite membrane plate according to claim 1, wherein the method comprises the following steps: in step 5, the temperature is 20-25 ℃, the humidity is 35-45% RH, the standing time is 8-30h, in step 6, the highest baking temperature is 175-185 ℃, the baking time is 8-20h, and in step 7, the slitting speed is 10-15m/min.
9. The method for manufacturing the improved composite membrane plate according to claim 8, wherein the method comprises the following steps: in step 6, the whole baking process is divided into three stages: from room temperature to maximum temperature, maintaining the maximum temperature phase and for a period of time from maximum temperature to room temperature, the maximum temperature being 180 ℃.
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